WO2021215432A1 - Système luminescent - Google Patents

Système luminescent Download PDF

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Publication number
WO2021215432A1
WO2021215432A1 PCT/JP2021/016013 JP2021016013W WO2021215432A1 WO 2021215432 A1 WO2021215432 A1 WO 2021215432A1 JP 2021016013 W JP2021016013 W JP 2021016013W WO 2021215432 A1 WO2021215432 A1 WO 2021215432A1
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WO
WIPO (PCT)
Prior art keywords
light
emitting system
optical fiber
light emitting
light source
Prior art date
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PCT/JP2021/016013
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English (en)
Japanese (ja)
Inventor
利彦 佐藤
陽介 溝上
七井　識成
Original Assignee
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2022517051A priority Critical patent/JP7458039B2/ja
Priority to US17/919,261 priority patent/US11860508B2/en
Priority to EP21791756.6A priority patent/EP4142072A4/fr
Publication of WO2021215432A1 publication Critical patent/WO2021215432A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
    • G02F1/365—Non-linear optics in an optical waveguide structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06754—Fibre amplifiers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0003—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being doped with fluorescent agents
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/0006—Coupling light into the fibre
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/0008—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted at the end of the fibre
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
    • G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/08086—Multiple-wavelength emission
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/0619—Coatings, e.g. AR, HR, passivation layer
    • H01S3/0621—Coatings on the end-faces, e.g. input/output surfaces of the laser light
    • H01S3/0623—Antireflective [AR]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16—Solid materials
    • H01S3/1601—Solid materials characterised by an active (lasing) ion
    • H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
    • H01S3/1605—Solid materials characterised by an active (lasing) ion rare earth terbium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16—Solid materials
    • H01S3/1601—Solid materials characterised by an active (lasing) ion
    • H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
    • H01S3/1613—Solid materials characterised by an active (lasing) ion rare earth praseodymium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
    • H01S3/2375—Hybrid lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
    • H01S3/2383—Parallel arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/30—Structure or shape of the active region; Materials used for the active region
    • H01S5/32—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures
    • H01S5/323—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser
    • H01S5/32308—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser emitting light at a wavelength less than 900 nm
    • H01S5/32341—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser emitting light at a wavelength less than 900 nm blue laser based on GaN or GaP
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
    • H01S5/4087—Array arrangements, e.g. constituted by discrete laser diodes or laser bar emitting more than one wavelength

Definitions

  • the present disclosure generally relates to a light emitting system, and more particularly to a light emitting system including an optical fiber.
  • Patent Document 1 a lighting fixture including a case, a projection lens, and a light source device has been proposed (Patent Document 1).
  • the light source device described in Patent Document 1 includes a solid-state light source and an optical transmission fiber.
  • the optical transmission fiber has a first end face and a second end face, and excitation light emitted from a solid-state light source is introduced from the first end face.
  • the optical transmission fiber has a wavelength conversion core, a light guide core, and a cladding.
  • the wavelength conversion core includes a wavelength conversion material that absorbs excitation light to generate an inverted distribution state of electrons and emits wavelength conversion light in the visible light region.
  • the light guide core covers the periphery of the wavelength conversion core and transmits the wavelength conversion light from the first end face side to the second end face side.
  • the clad covers the periphery of the light guide core.
  • the optical transmission fiber is configured such that stimulated emission is generated by wavelength-converted light propagating in the light guide core, and excitation light emitted from a solid-state light source and wavelength-converted light amplified by stimulated emission are emitted from the second end face. There is.
  • An object of the present disclosure is to provide a light emitting system capable of increasing the intensity of light having a wavelength different from that of excitation light.
  • the light emitting system includes an optical fiber, a first light source unit, a second light source unit, and a light guide body.
  • the optical fiber has a wavelength conversion unit including a wavelength conversion element.
  • the wavelength conversion element is excited by the excitation light and can generate naturally emitted light having a wavelength longer than that of the excitation light, and can be excited by the naturally emitted amplified light.
  • the first light source unit causes the excitation light to enter the optical fiber.
  • the second light source unit causes the optical fiber to receive seed light for generating stimulated emission light from the wavelength conversion element excited by the excitation light or the natural emission amplified light.
  • the light guide body guides and emits light from the optical fiber.
  • FIG. 1 is a configuration diagram of a light emitting system according to the first embodiment.
  • FIG. 2 is a cross-sectional view of an optical fiber in the same light emitting system.
  • 3A to 3C are explanatory views of the operating principle of the light emitting system of the same.
  • FIG. 4 is a configuration diagram of a light emitting system according to the second embodiment.
  • FIG. 5 is a configuration diagram of a light emitting system according to the third embodiment.
  • FIG. 6A is a plan view of the light emitting system according to the fourth embodiment.
  • FIG. 6B is a cross-sectional view of a main part of the light emitting system of the same.
  • the light emitting system 1 uses an excitation light P1 for exciting a wavelength conversion element and an excitation light P1 on an optical fiber 2 to which a wavelength conversion element (element) is added. Seed light P2 for generating stimulated emission light P3 (see FIG. 3C) from the excited wavelength conversion element is incident. Light including excitation light P1 and stimulated emission light P3 is emitted from the optical fiber 2.
  • 3A to 3C are explanatory views of the operating principle of the light emitting system 1.
  • the vertical axis of FIGS. 3A, 3B and 3C is electron energy.
  • the upward arrow in FIG. 3A indicates the absorption of the excitation light P1.
  • the excitation light P1 incident on the optical fiber 2 excites the electron e ⁇ at the base level E0 (including a plurality of energy levels) of the wavelength conversion element to the excitation level E2. Then, the electron e ⁇ of the excitation level E2 transitions to the metastable level E1 having a lower energy than the excitation level E2. After that, for example, the seed light P2 having a wavelength corresponding to the energy difference between the upper energy level (hereinafter, also referred to as the second energy level) among the plurality of energy levels of the quasi-stable level E1 and the basal level E0 (hereinafter, also referred to as the second energy level).
  • Stimulated emission light P3 (P32) is generated when the electron e ⁇ of the quasi-stable level E1 transitions to the second energy level by P22). Further, the seed light P2 (P21) having a wavelength corresponding to the energy difference between the plurality of energy levels of the quasi-stable level E1 and the basal level E0 and the first energy level lower than the second energy level is quasi-level. Stimulated emission light P3 (P31) is generated when the electron e ⁇ of the stable level E1 transitions to the first energy level.
  • the light emitting system 1 is used for, for example, lighting, but is not limited to this, and may be, for example, for display or illumination.
  • the light emitting system 1 may be applied to a facility or a moving body.
  • Facilities include, for example, warehouses, airports, detached houses, apartment buildings, office buildings, stores, museums, hotels, factories, and the like.
  • the moving body is, for example, a car, a bicycle, a train, an airplane, a ship, a drone, or the like.
  • the light emitting system 1 includes an optical fiber 2, a first light source unit 11, a second light source unit 12, and a light guide body 6.
  • the first light source unit 11 causes the excitation light P1 to enter the light incident unit 21 of the optical fiber 2.
  • the second light source unit 12 causes the light incident portion 21 to receive the seed light P2 (hereinafter, also referred to as the external seed light P2) for generating the stimulated emission light P3 from the wavelength conversion element excited by the excitation light P1. ..
  • the optical fiber 2 has a core 3, a clad 4, and a covering portion 5.
  • the clad 4 covers the outer peripheral surface of the core 3.
  • the covering portion 5 covers the outer peripheral surface of the clad 4.
  • the cross-sectional shape orthogonal to the optical axis direction is a circular shape.
  • the clad 4 is arranged coaxially with the core 3.
  • the core 3 has a first end surface and a second end surface opposite to the first end surface in the length direction of the core 3.
  • the core 3 includes a translucent material and a wavelength conversion element.
  • the concentration of the wavelength conversion element in the core 3 may or may not be substantially uniform over the entire length of the core 3.
  • the refractive index of the core 3 is substantially the same as the refractive index of the above-mentioned translucent material which is the main component of the core 3.
  • the translucent material is, for example, either fluoride, oxide, or nitride.
  • the fluoride is, for example, fluoride glass.
  • the oxide is, for example, silicon oxide, quartz or the like.
  • the wavelength conversion element is a rare earth element.
  • the wavelength conversion element includes, for example, an element selected from the group of Pr, Tb, Ho, Dy, Er, Eu, Nd and Mn.
  • the wavelength conversion element is contained in the core 3 as an ion of a rare earth element, and is contained, for example, as an ion of Pr (Pr 3+ ) and an ion of Tb (Tb 3+ ).
  • the wavelength conversion element is excited by light P1 or amplified by spontaneous emission light emitted from a wavelength conversion element other than itself as internal seed light, that is, natural emission amplified light (ASE). May be done.
  • the wavelength conversion element emits ASE peculiar to the element of the wavelength conversion element, and also generates stimulated emission light having the same wavelength as the wavelength of the external seed light P2, and these are combined to generate stimulated emission. It is emitted as light P3.
  • the wavelengths of the ASE and the external seed light P2 are longer than the wavelength of the excitation light P1 (for example, 440 to 450 nm).
  • the wavelength of the seed light P2 will be described in the column of "(2.3) Second light source unit".
  • Pr 3+ is a wavelength conversion element capable of emitting amplified light of ASE or seed light in the range of cyan to red.
  • the intensity of stimulated emission depends on the intensity of the internal seed light (spontaneous emission light) and the external seed light.
  • Tb 3+ can be excited by absorbing ASE from Pr 3+ to generate ASE having a wavelength peculiar to Tb 3+.
  • the refractive index of the clad 4 is smaller than the refractive index of the core 3.
  • the clad 4 does not include the wavelength conversion element contained in the core 3.
  • the material of the covering portion 5 is, for example, a resin.
  • the optical fiber 2 has a light incident unit 21, a light emitting unit 22, and a wavelength conversion unit 23.
  • the light incident portion 21 is a portion where the excitation light P1 is incident, and includes, for example, the first end surface of the core 3.
  • the light emitting unit 22 includes a second end surface of the core 3 from which light including excitation light P1 and stimulated emission light P3 including ASE is emitted.
  • the light incident portion 21 may include a reflection reducing portion that reduces the reflection of the excitation light P1 incident on the light incident portion 21 from the outside of the optical fiber 2.
  • the reflection reducing portion may be, for example, an anti-reflection coat that covers the first end surface of the core 3.
  • the wavelength conversion unit 23 is provided between the light incident unit 21 and the light emitting unit 22.
  • the wavelength conversion unit 23 includes a wavelength conversion element that is excited by the excitation light P1 and emits light having a wavelength longer than that of the excitation light P1.
  • the wavelength conversion element is an element capable of absorbing the excitation light P1 and amplifying naturally emitted light or seed light having a wavelength longer than that of the excitation light P1 by stimulated emission.
  • the diameter of the core 3 is, for example, 25 ⁇ m to 500 ⁇ m.
  • the length of the optical fiber 2 is, for example, 3 m to 10 m. Regarding the length of the wavelength conversion unit 23, it is preferable that the lower the concentration of the wavelength conversion element in the wavelength conversion unit 23, the longer the length.
  • the numerical aperture of the optical fiber 2 is, for example, 0.22.
  • the density of the wavelength conversion element in the wavelength conversion unit 23 is the concentration of the wavelength conversion element in the core 3.
  • the first light source unit 11 emits excitation light P1 for exciting a wavelength conversion element included in the wavelength conversion unit 23 of the optical fiber 2.
  • the excitation light P1 emitted from the first light source unit 11 is incident on the light incident unit 21 of the optical fiber 2.
  • the wavelength of the excitation light P1 is preferably 350 nm or more and 500 nm or less.
  • the first light source unit 11 includes, for example, a laser light source.
  • the laser light source emits laser light.
  • the excitation light P1 laser light emitted from the laser light source
  • the laser light source is, for example, a semiconductor laser that emits a blue laser beam.
  • the wavelength of the excitation light P1 is, for example, 440 nm to 450 nm.
  • Second light source unit The second light source unit 12 emits the seed light P2.
  • the seed light P2 emitted from the second light source unit 12 is incident on the light incident unit 21 of the optical fiber 2.
  • the light emitting system 1 includes a plurality of (for example, two) second light source units 12.
  • the two second light source units 12 emit, for example, seed light P2 having one wavelength different from each other.
  • one of the two second light source units 12 will be referred to as a second light source unit 121, and the remaining one second light source unit 12 will be referred to as a second light source unit 122.
  • the second light source unit 121 is, for example, a semiconductor laser that emits green light.
  • the second light source unit 122 is, for example, a semiconductor laser that emits red light.
  • the wavelength of the green seed light P21 is preferably, for example, about 520 nm
  • the wavelength of the red seed light P22 is preferably, for example, about 640 nm.
  • Each second light source unit 12 is a light source that emits quasi-monochromatic light.
  • the quasi-monochromatic light is light included in a narrow wavelength range (for example, 10 nm).
  • the number of the second light source units 12 in the light emitting system 1 is not limited to two, and may be three or more, or one.
  • the three second light source units 12 include a semiconductor laser that emits green light, a semiconductor laser that emits red light, and orange light. A semiconductor laser that emits light may be provided.
  • the wavelength of the orange seed light is preferably, for example, about 600 nm.
  • the light emitted from the second light source unit 121 is incident on the light incident unit 21 of the optical fiber 2 as the seed light P2 (P21). Further, the light emitted from the second light source unit 122 is incident on the light incident unit 21 of the optical fiber 2 as the seed light P2 (P22).
  • the light guide body 6 guides and emits light from the optical fiber 2.
  • the light guide body 6 has a side surface 61 and an end surface 62 on the side opposite to the optical fiber 2 side.
  • the light guide body 6 emits light from the optical fiber 2 (the light emitting portion 22 of the optical fiber 2) from at least the side surface 61.
  • the light guide body 6 may emit light from the optical fiber 2 from the side surface 61 and also from the end surface 62.
  • the light guide body 6 is linear. With respect to the light guide body 6, the cross-sectional shape orthogonal to the length direction (optical axis direction) is a circular shape.
  • the diameter of the light guide body 6 is preferably equal to or larger than the diameter of the core 3, for example, and is substantially the same as the diameter of the optical fiber 2.
  • the light guide body 6 is colorless and transparent, but is not limited to this.
  • the material of the light guide body 6 is, for example, an acrylic resin. In the light emitting system 1, it is preferable that the difference between the refractive index of the light guide body 6 and the refractive index of the core 3 is small.
  • the light guide body 6 may have a concave-convex structure that controls the light distribution of light emitted from the light guide body 6 on at least a part of the side surface 61.
  • the light guide body 6 is coupled to the optical fiber 2 so that the light from the optical fiber 2 is incident.
  • the light guide body 6 is fused to the optical fiber 2, but the light guide body 6 is not limited to this, and may be bonded by, for example, an adhesive that is transparent to visible light.
  • the adhesive is, for example, an epoxy resin or an acrylic resin.
  • the light guide body 6 has flexibility, but is not limited to this, and may not have flexibility.
  • the light emitting system 1 includes a housing 10 for accommodating the first light source unit 11 and the second light source unit 12.
  • the light emitting system 1 further includes an adjusting unit 7.
  • the adjusting unit 7 adjusts the intensity of the seed light P2 having at least one wavelength.
  • the adjusting unit 7 adjusts the intensity of the excitation light P1 and the intensity of each of the plurality of seed lights P21 and P22.
  • the adjusting unit 7 includes a first drive circuit for driving the first light source unit 11, and a plurality of second drive circuits for driving the second light source unit 12 having a one-to-one correspondence with the plurality of second light source units 12. It includes a first drive circuit and a control circuit that individually controls a plurality of second drive circuits.
  • the control circuit individually controls the first drive circuit and the plurality of second drive circuits, so that the chromaticity of the light emitted from the optical fiber 2 (the light emitting unit 22 of the optical fiber 2) can be adjusted. ..
  • the light emitting system 1 can be adjusted in color by including the adjusting unit 7.
  • the light emitting system 1 can adjust the color of the light emitted from the light guide body 6.
  • the adjusting unit 7 is housed in the housing 10, but the present invention is not limited to this, and the adjusting unit 7 may not be housed in the housing 10.
  • a power supply voltage is supplied to the first drive circuit and the plurality of second drive circuits, for example, from the first power supply circuit.
  • the control circuit is supplied with a power supply voltage from, for example, a second power supply circuit.
  • the first power supply circuit and the second power supply circuit are not included in the components of the light emitting system 1, but are not limited to this, and may be included.
  • the light emitting system 1 may further include an optical coupling portion for incidenting the excitation light P1 and each seed light P2 on the light incident portion 21 of the optical fiber 2.
  • the optical coupling portion is arranged at the opening of the housing 10.
  • the optical coupling portion is a grating, but is not limited to this.
  • the grating is a transmission type diffraction grating.
  • the material of the grating is, for example, quartz, but is not limited to this.
  • the excitation light P1 is emitted from the first light source unit 11 and the seed light P2 is emitted from the second light source unit 12.
  • the excitation light P1 and the seed light P2 are incident on the light incident portion 21 of the optical fiber 2.
  • a part of the excitation light P1 incident on the light incident portion 21 is emitted from the light emitting portion 22.
  • the light emitted from the light emitting unit 22 of the optical fiber 2 is the excitation light P1, the ASE having a wavelength of about 480 nm generated from the wavelength conversion element, and the induced emission light having the same wavelength as the seed light P2. (P3) and mixed color light.
  • the two types of stimulated emission lights P31 and P32 which correspond one-to-one with the plurality of seed lights P21 and P22 and have different wavelengths from each other, are, for example, green light and red light, respectively.
  • the mixed color light is, for example, white light.
  • the lower stimulated emission light P3 (P31) is green light
  • the upper stimulated emission light P3 (P32) is red light.
  • stimulated emission is generated by the naturally emitted light and the seed light P2, so that the excitation light P1 incident on the light incident portion 21 and the stimulated emission light P3 amplified by the stimulated emission are emitted from the light emitting portion 22. ..
  • the intensity of the induced emission light P3 having the same wavelength as the seed light P21 is the intensity of the seed light P21 incident on the light incident section 21 from the second light source section 121.
  • the intensity of the induced emission light P3 having the same wavelength as the seed light P22 is determined by the seed light P22 incident on the light incident unit 21 from the second light source unit 122. Greater than the strength of.
  • the mixed color light emitted from the light emitting unit 22 of the optical fiber 2 is incoherent light.
  • the stimulated emission light P3 increases or decreases as the light incident portion 21 of the optical fiber 2 approaches the light emitting portion 22.
  • the chromaticity, color temperature, color rendering property, etc. of the light emitted from the light guide body 6 are determined according to the wavelength of the ASE and the wavelength of the seed light P2.
  • the operation of the light emitting system 1 is different from the operation of the fiber laser that oscillates the laser.
  • the wavelength conversion element serving as a heat generating source is dispersed in the core 3 of the optical fiber 2, it is possible to suppress the temperature rise during use.
  • the adjusting unit 7 adjusts the intensity of the excitation light P1 and the intensity of each of the plurality of seed lights P2, but the adjustment unit 7 is not limited to this, and the adjusting unit 7 is a seed having at least one wavelength. It may be configured to adjust the intensity of the light P2.
  • the light emitting system 1 includes an optical fiber 2, a first light source unit 11, a second light source unit 12, and a light guide body 6.
  • the optical fiber 2 has a wavelength conversion unit 23 including a wavelength conversion element.
  • the wavelength conversion element can be excited by the excitation light P1 to generate spontaneous emission light having a wavelength longer than that of the excitation light P1, and can be excited by the natural emission amplified light.
  • the first light source unit 11 causes the excitation light P1 to enter the optical fiber 2.
  • the second light source unit 12 causes the optical fiber 2 to receive the seed light P2 for generating the stimulated emission light P3 from the wavelength conversion element excited by the excitation light P1 and the natural emission amplified light.
  • the light guide body 6 guides and emits light from the optical fiber 2.
  • the light emitting system 1 it is possible to increase the intensity of light having a wavelength different from that of the excitation light P1 (stimulated emission light P3).
  • the light emitting system 1 since the light emitting system 1 according to the first embodiment emits light from the light guide body 6 to the external space without providing a lamp and a lens, it is possible to reduce the size and weight.
  • the light guide body 6 is linear. As a result, in the light emitting system 1, it is possible to reduce the size and weight of the light guide body 6 while expanding the irradiation range of the light emitted from the light guide body 6.
  • the light emitting system 1 further includes an adjusting unit 7 for adjusting the intensity of each of the seed lights P2 having a plurality of wavelengths, the chromaticity of the light emitted from the light guide body 6 can be adjusted. ..
  • the wavelength conversion unit 23 contains Pr 3+ as a wavelength conversion element, and not only emits cyan ASE, but also emits seed light P2 having a plurality of wavelengths as a light incident unit. Since the light is incident on the 21, the intensity of each of the green stimulated emission light and the red stimulated emission light can be increased. As a result, the light emitting system 1 according to the first embodiment can improve the color rendering property of the light emitted from the light guide body 6. Further, in the light emitting system 1 according to the first embodiment, since the wavelength conversion unit 23 contains Pr 3+ and Tb 3+ as two types of wavelength conversion elements, the color rendering property of the light emitted from the light guide body 6 can be improved. It is possible to further improve.
  • the light emitting system 1a according to the second embodiment is different from the light emitting system 1 according to the first embodiment in that the light emitting body 6a is provided instead of the light guide body 6 in the light emitting system 1 according to the first embodiment.
  • the light guide body 6a includes a first light guide unit 65 that is directly connected to the optical fiber 2 and a plurality of (for example, two) second light guide units 66 that are branched from the first light guide unit 65. Has.
  • the light guide body 6a guides and emits light from the optical fiber 2.
  • the light guide body 6a has a side surface (side surface 651 of the first light guide unit 65 and each side surface 661 of the plurality of second light guide portions 66) and an end surface (a plurality of second guides) on the side opposite to the optical fiber 2 side. Each end face 662) of the light portion 66 has.
  • the light guide body 6a emits light from the optical fiber 2 (light emitting portion 22) from at least the side surface of the light guide body 6a.
  • the light guide body 6a may emit light from the optical fiber 2 from the side surface of the light guide body 6a and also emit light from the end surface of the light guide body 6a.
  • the first light guide unit 65 is linear.
  • the cross-sectional shape orthogonal to the length direction (optical axis direction) is a circular shape.
  • the diameter of the first light guide portion 65 is preferably, for example, equal to or larger than the diameter of the core 3 (see FIG. 2) of the optical fiber 2, and is substantially the same as the diameter of the optical fiber 2 as an example.
  • the cross-sectional shape orthogonal to the length direction (optical axis direction) is a circular shape.
  • the light guide body 6a is colorless and transparent, but the light guide body 6a is not limited to this.
  • the material of the light guide body 6a is, for example, an acrylic resin.
  • the light guide body 6a may have a concavo-convex structure that controls the light distribution of the light emitted from the light guide body 6a on at least a part of the side surface.
  • the first light guide unit 65 is directly connected to the optical fiber 2 so that the light from the optical fiber 2 is incident.
  • the first light guide portion 65 is coupled to the optical fiber 2.
  • the light guide body 6a is fused to the optical fiber 2, but is not limited to this, and may be bonded by, for example, an adhesive that is transparent to visible light.
  • the adhesive is, for example, an epoxy resin or an acrylic resin.
  • the light guide body 6a has flexibility, but is not limited to this, and may not have flexibility.
  • the light emitting system 1a according to the second embodiment includes a wavelength conversion unit 23 (see FIG. 2) including a wavelength conversion element, a first light source unit 11, and a second light source unit 12. , The light guide body 6a, and the like.
  • the light emitting system 1a according to the second embodiment can increase the intensity of light (stimulated emission light P3) having a wavelength different from that of the excitation light P1 as in the light emitting system 1 according to the first embodiment.
  • the irradiation range of the light emitted from the light guide body 6a can be set. It can be expanded.
  • the light emitting system 1b includes a plurality of optical fibers 2 (two in the illustrated example).
  • the light guide body 6 guides and emits light from a plurality of optical fibers 2.
  • the light incident portions 21 of the plurality of optical fibers 2 are arranged apart from each other.
  • a plurality of optical fibers 2 are bundled (in other words, coupled) on the side opposite to the light incident portion 21 side, and the light emitting portion 22 of the plurality of optical fibers 2 is common.
  • the light emitting system 1b includes a first light source unit 11 and a plurality of (two) second light source units 12 for each of the plurality (two) optical fibers 2.
  • the light emitting system 1b includes two sets of a first light source unit 11 and two second light source units 12. These two sets are housed in one housing 10.
  • the adjusting unit 7 controls the first light source unit 11 and the plurality of second light source units 12 of each set.
  • the wavelength conversion unit 23 (see FIG. 2) including the wavelength conversion element, the first light source unit 11, and the second light source unit 12 , The light guide body 6.
  • the wavelength conversion unit 23 including the wavelength conversion element, the first light source unit 11, and the second light source unit 12 , The light guide body 6.
  • the light emitting system 1b since the light emitting system 1b according to the third embodiment guides and emits light from a plurality of optical fibers 2 in the light guide body 6, the amount of light emitted from the light guide body 6 can be increased. ..
  • the light emitting system 1c according to the fourth embodiment will be described with reference to FIGS. 6A and 6B.
  • the same components as those of the light emitting system 1 according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
  • the light emitting system 1c includes a housing and an adjusting unit similar to the housing 10 and the adjusting unit 7 of the light emitting system 1 according to the first embodiment.
  • the light emitting system 1c according to the fourth embodiment is different from the light emitting system 1 according to the first embodiment in that the light emitting body 6c is provided instead of the light guide body 6 in the light emitting system 1 according to the first embodiment. Further, the light emitting system 1c according to the fourth embodiment includes a plurality of optical fibers 2 (three in the illustrated example).
  • the light guide body 6c is a light guide plate. More specifically, the light guide body 6c includes a rectangular plate-shaped light guide plate main body 600 and a plurality of reflecting portions 603.
  • the light guide plate main body 600 has a plurality of light incident surfaces 604 having a one-to-one correspondence with the plurality of optical fibers 2. Each of the plurality of light incident surfaces 604 is concave.
  • the light guide plate main body 600 has a first main surface 601 and a second main surface 602 that intersect with each other in the thickness direction of the light guide plate main body 600.
  • the plurality of reflecting portions 603 are provided on the second main surface 602 of the light guide plate main body 600.
  • the first main surface 601 of the light guide plate main body 600 has a concavo-convex structure for emitting light that guides the light guide body 6c to an external space.
  • At least a part of the light from each optical fiber 2 is emitted from the first main surface 601 of the light guide plate main body 600 in the light guide body 6c.
  • the light emitting system 1c according to the fourth embodiment includes a wavelength conversion unit 23 (see FIG. 2) including a wavelength conversion element, a first light source unit 11, a second light source unit 12, and a light guide body 6c.
  • the light emitting system 1c according to the fourth embodiment can increase the intensity of light (stimulated emission light P3) having a wavelength different from that of the excitation light P1 as in the light emitting system 1 according to the first embodiment.
  • the light emitting system 1c according to the fourth embodiment can be applied to, for example, an guide light system or a display system.
  • an appropriate notation may be formed by printing on the first main surface 601 of the light guide plate main body 600, or a translucent property having an appropriate notation on the first main surface 601 side of the light guide plate main body 600. Panels may be arranged.
  • the above embodiments 1 to 4 are only one of the various embodiments of the present disclosure.
  • the above-described embodiments 1 to 4 can be changed in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.
  • the number of wavelength conversion units 23 between the light incident unit 21 and the light emitting unit 22 is not limited to one, and may be, for example, a plurality.
  • the plurality of wavelength conversion units 23 are arranged in the optical axis direction of the core 3.
  • the length of the wavelength conversion unit 23 may be shorter than the length of the core 3 not only when the length of the wavelength conversion unit 23 is substantially the same as the length of the core 3.
  • the laser light source included in the first light source unit 11 is not limited to a semiconductor laser that emits a blue laser beam, and may be, for example, a semiconductor laser that emits a purple laser beam. Further, the first light source unit 11 is not limited to the semiconductor laser, and may have a configuration including, for example, an LED (Light Emitting Diode) light source and an optical system.
  • a semiconductor laser that emits a blue laser beam may be, for example, a semiconductor laser that emits a purple laser beam.
  • the first light source unit 11 is not limited to the semiconductor laser, and may have a configuration including, for example, an LED (Light Emitting Diode) light source and an optical system.
  • the second light source unit 121 is not limited to the semiconductor laser that emits green light, and may be, for example, an LED that emits green light. Further, the second light source unit 122 is not limited to the semiconductor laser that emits red light, and may be, for example, an LED that emits red light.
  • the relative positional relationship between the first light source unit 11 and the plurality of second light source units 12 and the light incident unit 21 of the optical fiber 2 is not limited to the positional relationship in the first to fourth embodiments.
  • the first light source unit 11 and the plurality of second light source units 12 and the light incident unit 21 of the optical fiber 2 are arranged.
  • the relative positional relationship between the second light source unit 12 and the light incident unit 21 of the optical fiber 2 may be changed.
  • the light emitting systems 1, 1a, 1b, 1c include a plurality of second light source units 12 for one optical fiber 2, but the present invention is not limited to this, and at least one for one optical fiber 2.
  • the second light source unit 12 may be provided.
  • the adjusting unit 7 only needs to be able to adjust the intensity of the seed light P2 having at least one wavelength of the plurality of seed light P2.
  • the number of optical fibers 2 is not limited to two, and may be three or more. In this case, for example, five optical fibers 2 and two light guides 6 are provided, and three of the five optical fibers 2 are connected to one light guide 6, and the remaining two. One optical fiber 2 may be connected to the other light guide body 6.
  • a plurality of optical fibers 2 are bundled and directly connected to the light guide body 6, but the light guide body 6 is not limited to this and is connected to the plurality of optical fibers 2 on a one-to-one basis. It may have a plurality of first light guide units and one second light guide unit connected to the plurality of first light guide units.
  • the light emitting systems 1b and 1c are provided with a first light source unit 11 and a plurality of second light source units 12 for each of the plurality of optical fibers 2, but the present invention is not limited to this.
  • the excitation light P1 emitted from the first light source unit 11 is incident on the plurality of optical fibers 2 with respect to the set of the first light source unit 11 and the plurality of second light source units 12.
  • a 1-beam splitter and a plurality of second beam splitters for incident the seed light P2 emitted from each of the plurality of second light source units 12 onto the plurality of optical fibers 2 may be provided.
  • the light emitting system (1; 1a; 1b; 1c) includes an optical fiber (2), a first light source unit (11), a second light source unit (12), and a light guide body (6; 6a; 6c) and.
  • the optical fiber (2) has a wavelength conversion unit (23) including a wavelength conversion element.
  • the wavelength conversion element is excited by the excitation light (P1) and can generate naturally emitted light having a wavelength longer than that of the excitation light (P1), and can be excited by the naturally emitted amplified light.
  • the first light source unit (11) causes the excitation light (P1) to enter the optical fiber (2).
  • the second light source unit (12) uses the optical fiber (2) to provide seed light (P2) for generating stimulated emission light (P3) from a wavelength conversion element excited by excitation light (P1) or natural emission amplified light. To be incident on.
  • the light guide body (6; 6a; 6c) guides and emits light from the optical fiber (2).
  • the light emitting system (1; 1a; 1b; 1c) it is possible to increase the intensity of light having a wavelength different from that of the excitation light (P1) (stimulated emission light P3).
  • the wavelength of the excitation light (P1) is 350 nm or more and 500 nm or less.
  • the wavelength conversion element can be excited more efficiently.
  • the light emitting system (1; 1a; 1b; 1c) according to the third aspect further includes an adjusting unit (7) in the first or second aspect.
  • the adjusting unit (7) adjusts the intensity of the seed light (P2).
  • the chromaticity of the light emitted from the light guide body (6; 6a; 6c) can be adjusted.
  • the light emitting system (1; 1a; 1b; 1c) according to the fourth aspect includes a plurality of second light source units (12) in any one of the first to third aspects.
  • the plurality of second light source units (12) output a plurality of seed lights (P2).
  • the plurality of seed lights (P2) output from the plurality of second light source units (12) have different wavelengths from each other.
  • light including a plurality of stimulated emission lights (P3) corresponding to a plurality of seed lights (P2) in a one-to-one manner is emitted by a light guide body (6; It is possible to emit light from 6a; 6c), and it is possible to improve the color rendering property.
  • the light guide body (6; 6a) has a side surface (61; 651,661). It has an end face (62; 662) opposite to the optical fiber (2) side.
  • the light guide (6; 6a) emits at least a part of the light from the optical fiber (2) from the side surface (61; 651,661) of the light guide (6; 6a).
  • the light guide body (6) is linear in any one of the first to fifth aspects.
  • the light emitting system (1; 1b) it is possible to reduce the size and weight of the light guide body (6) while expanding the irradiation range of the light emitted from the light guide body (6). It will be possible.
  • the light guide body (6a) is the first light guide directly connected to the optical fiber (2). It has a section (65) and a plurality of second light guide sections (66) branched from the first light guide section (65).
  • the light emitting system (1a) according to the seventh aspect it is possible to widen the irradiation range of the light emitted from the light guide body (6a).
  • the light emitting system (1b; 1c) includes a plurality of optical fibers (2) in any one of the first to seventh aspects.
  • the light guide body (6; 6c) guides and emits light from at least two or more optical fibers (2) among the plurality of optical fibers (2).
  • the amount of light emitted from the light guide body (6; 6c) can be increased.
  • the first light source unit (11) includes a laser light source.
  • the intensity of the excitation light (P1) can be increased.
  • the second light source unit (12) includes a laser light source.
  • the intensity of the seed light (P2) can be increased.
  • the wavelength conversion element is Pr, Tb, Ho, Dy, Er, Eu, Nd. And one or more elements selected from the group of Mn.
  • the light emitting system (1; 1a; 1b; 1c) for example, when two or more elements are included as wavelength conversion elements, another element is excited by excitation by natural emission amplified light from at least one element. Amplified spontaneous emission at different wavelengths from the element can also be generated.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

La présente invention augmente l'intensité d'une lumière présentant une longueur d'onde différente de celle d'une lumière d'excitation. Ce système luminescent (1) comporte une fibre optique (2), une première unité (11) de source lumineuse, une seconde unité (12) de source lumineuse, et un corps (6) de guide de lumière. La fibre optique (2) est dotée d'une unité de conversion de longueur d'onde qui comprend un élément de conversion de longueur d'onde. L'élément de conversion de longueur d'onde peut être excité par une lumière (P1) d'excitation de façon à générer une lumière d'émission spontanée présentant une longueur d'onde plus longue que celle de la lumière (P1) d'excitation, et peut être excité par une lumière d'émission spontanée amplifiée. La première unité (11) de source lumineuse fait entrer la lumière (P1) d'excitation dans la fibre optique (2). La seconde unité (12) de source lumineuse fait entrer une lumière (P2) d'amorçage dans la fibre optique (2), la lumière (P2) d'amorçage étant utilisée pour provoquer la génération d'une lumière d'émission stimulée à partir de l'élément de conversion de longueur d'onde qui a été excité soit par la lumière (P1) d'excitation, soit par la lumière d'émission spontanée. Le corps (6) de guide de lumière guide une lumière provenant de la fibre optique (2) et émet ladite lumière.
PCT/JP2021/016013 2020-04-24 2021-04-20 Système luminescent WO2021215432A1 (fr)

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US17/919,261 US11860508B2 (en) 2020-04-24 2021-04-20 Light-emitting system
EP21791756.6A EP4142072A4 (fr) 2020-04-24 2021-04-20 Système luminescent

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US11860508B2 (en) 2024-01-02
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JP7458039B2 (ja) 2024-03-29
US20230152666A1 (en) 2023-05-18

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